Download NDI-160/20 - Varex Imaging

NDI-160-20
X-RAY
PRODUCTS
Stationary Anode X-Ray Tube
X-Ray Tube Specifications
Maximum Peak Voltage . . . . . . . . . . . . . . . . . . . . . . 160 kV Temperature at fluid inlet (maximum) . . . . . . . . . . . 35°C
Focal Spot EN12543
Cooling Medium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Water
Small . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D = 1.0 mm
Large . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D = 1.0 mm Reference Axis . . . . . . . . . . . . . Perpendicular to port face.
Focal Spot IEC
Radiation Coverage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40°
Small . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.4 mm
Large . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.4 mm Loading Factors for Leakage Radiation . . . 160 kV, 4 mA
Target Angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20° X-Ray Tube Assembly Permanent Filtra . . . . 0.8 mm Be
Maximum Continuous Rating
High Voltage Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . R24
Small . . . . . . . . . . . . 640 W with 4 Litre/min cooling flow
Large . . . . . . . . . . . . 640 W with 4 Litre/min cooling flow Weight (approx.) . . . . . . . . . . . . . . . . . . . . 7.5 kg ( 16.2 lbs)
WARNING
Beryllium windows transmit a very high level of long wavelength X-radiation, which can injure human tissue. Injury may occur from
even very short exposures to the primary X-ray beam. Follow all precautions necessary to avoid radiation exposure to humans.
The radiation dose rate cannot be accurately measured with conventional radiation measurement instruments. Radiation intensity in each
installation will vary, and calibration must include the effects of long wavelength X-radiation.
Fumes from beryllium metal (or its compounds) as well as dust can be hazardous if inhaled. During use, corrosion products may occur
on the beryllium window, but these should not be scraped off, machined, or otherwise removed. Tube unit disposal should conform to
federal, state, and local regulations governing beryllium.
Copyright © 2012, Varian Medical Systems. All Rights Reserved.
28320 Rev E 01/12
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NDI-160-20
X-RAY
PRODUCTS
Instructions for Installation and Operation
Instructions for Installation
Operation
Connection of the x-ray tube
The careful adjustment of the pressure gap and the use of the correct amount of silicone grease are extremely important. First, clean
the rubber cone carefully with a lint-free cloth. Take specific care
that the contacts are absolutely free of old grease or oxide layers.
Use only pure alcohol for cleaning, no other detergents. Cover the
entire cone with a thin film of the supplied silicone grease, apply a
rope of approximately 3 cm of grease and spread it gently, avoiding
the contact tip. The grease layer must be kept free of air
bubbles, dust or dirt.
General
The control of the high voltage and the filament current as well as
the design of the cooling unit is the responsibility of the equipment
manufacturer.
High Voltage Connection
One terminal type R24 high voltage cables supply high voltage and
filament current.
Two different methods of mounting the high voltage cable are available.
Cable terminal with mounting flange
Rotate the mounting flange until there is a gap of 3-4 mm between
the mounting flange and the tube. Remove the cable plug and carefully grease using the supplied high voltage insulating compound.
Introduce the greased terminal plug parallel to the axis of the high
voltage receptacle socket and advance until it stops.
Cooling of the Anode
It is the responsibility of the customer to ensure that the cooling
medium flow meets the required cooling conditions. Insufficient
cooling of the anode can lead to the destruction of the anode, therefore cooling must be switched on before the application of high
voltage.
Mounting flange
Attach the mounting flange to the tube housing using the flange fastening screws making sure not to rotate the mounting flange from
its setup position.
Control of Cooling Medium
Flow, pressure, and temperature of the cooling medium at the inlet
to the tube or the tube assembly must be appropriately monitored.
High voltage must be terminated when the pressure or flow rate fall
below the minimum level or when the temperature exceeds the
maximum level. When the tube is switched off the coolant flow must
continue for at least 2 minutes in order to protect the anode from
destruction.
Manufactured by Varian Medical Systems
Specifications subject to change without notice.
X-RAY
PRODUCTS
Salt Lake City, UT
1-801-972-5000
www.varian.com
Copyright © 2012, Varian Medical Systems. All Rights Reserved.
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